fijdor - why do you think it is call retreating blade stall? That is on the left in a counterclockwise rotor and that is the way it rolls. If the blade on the left stalls, please explain how the aircraft rolls to the right.
If your 205 did something different then either every book I have read about helicopter aerodynamics (including what is taught to both the UK and US military) is wrong or you suffered something other than RBS.